This species is known only from a small area on the north-western periphery of Toluca city, central State of Mexico, Mexico, at 3,000m asl.
Habitat and Ecology
This is a metamorphosing species spending most of its time on land in grassland habitat. It breeds in small pools and ponds, both artificial and natural.
There is no information available on the population status of this species.
Introduced predatory fishes are the major threat to this species, but the habitat also has been heavily impacted due to extensive urban and agricultural expansion (leading to the desiccation and pollution of its breeding habitat).
It does not occur in any protected area, and the conservation and restoration of its habitats is urgent. It might be possible to breed this species in captivity. A survey is urgently needed to determine the current status of this species. Protected under the category Pr (Special protection) by the Government of Mexico.
Red List Status
Critically Endangered (CR)
Listed as Critically Endangered because its Extent of Occurrence is less than 100 km2, all individuals are in a single sub-population, and there is continuing decline extent and quality of its habitat on the northwestern periphery of Toluca City.
The species boundaries between this species and both Ambystoma lermaense and A. rivularis require further investigation. However, these three taxa are clearly differentiated from all other Mexican ambystomatids (H.B. Shaffer pers. comm.).
Shaffer, H.B., Flores-Villela, O., Parra-Olea, G. & Wake, D. 2008. Ambystoma granulosum. The IUCN Red List of Threatened Species 2008: e.T59058A11877234. http://dx.doi.org/10.2305/IUCN.UK.2008.RLTS.T59058A11877234.en